Why your nation’s IQ matters more than your own.

“Within a country, the link between IQ and income appears modest, with one IQ point predicting 1% higher income per person. But across countries, that same IQ point predicts 6% higher income per person. Why would it be that the IQ of the country you live in matters more than your individual IQ for predicting eventual income? This led Jones on a quest to explore some of the reasons why this might be, and potential implications of this paradox, discussed in detail in his new book.1,2”